vapor recovery unit (vru) · 2020. 9. 16. · vru design outputs size of vapor line tovru: 10”...
Post on 07-Feb-2021
13 Views
Preview:
TRANSCRIPT
-
Vapor Recovery Unit (VRU)
March , 2017
-
What is VRU?
Recovery of vapors(mainly volatile hydrocarbons) in form of liquid, during loading/unloading process to/from road, rail or marine tankers
-
Why VRU?!
The cost of:
Safety in the terminal
Environmental impacts of hydrocarbon and chemical components, on both human health and pollution of troposphere
Venting of unrecovered product during loading/unloading processes ( Simply, money! )
-
HC Emission Norms
US EPA: 35 mg of HC vapor emitted per liter of liquid loaded
European norms (European Directive EC94/63): 35 mg of HC vapor emitted per liter of vapor at VRU outlet
Some European Countries (like France and Russia): 10 mg of HC vapor emitted per liter of vapor at VRU outlet
Germany (TA‐Luft 01), Switzerland (LRV) and Netherlands (NER): 0.15 mg of HC vapor emitted per liter of vapor at VRU outlet
Sultanate of Oman: 0.035 mg of HC vapor emitted per liter of vapor at VRU outlet
-
Various Technologies
Carbon Adsorption
Lean Oil Absorption
Refrigeration
Membranes
-
Why Carbon Adsorption?
Well‐proven in practice
Relatively easy to operate and maintain
The only required utility is electricity
Relatively low energy consumption
Low vapor concentration at VRU outlet with a singlestage unit
Near ambient pressure and temperature, no vaporholder, no refrigeration
-
Carbon Adsorption
-
Carbon Adsorption
-
Principals
The mass transfer zone removes the bulk of the HCs The transition zone provides a buffer for variations in flow
rate and concentration The emission level depends on level of vacuum:
100 mbar for 1000‐5000 mg/m3 30 mbar for 50‐100 mg/m3
-
Small size compared to LRVPs
Less complexity
Reduced power consumption (up to 40%), due to use of VFD
No ethylene glycol and associated equipment, no chance of corrosion and abrasion
Less maintenance requirements (no need to change glycol)
Dry Vacuum Pump (DVP)
-
No product contamination
No internal touching (metal) parts, no wear
Can handle liquid slugs
Overhaul required after 40,000 hours of operation, comes with 3 years guarantee and after sales services
Proven technology since 1999
Dry Vacuum Pump (DVP)
-
Based on 1200 g/m3 HC in the vapor inlet to the VRU:
Energy Consumption
Emission(g/m3)
35EU / US
20 10 1(Optimum)
0.15
Energy Required(kWh/m3)
0.08 0.09 0.09 0.1 0.2
g/m3 recovered 1179 1188 1194 1199.4 1199.92
-
Wood based: ‐ 1200~1800 m2/g of surface‐ Low density‐ Even distribution of micro, meso and macro pores‐ Activated by phosphoric acid‐More sensitive to hot spot formation
CECA ACX: ‐ Reactivity is tempered by a special resin, which gives the carbon a hygroscopic property and reduces the heat of adsorption‐ Expected life is more than 15 years in combination with DVS
Activated Carbon
-
Coal based: ‐ 1200~1800 m2/g of surface‐Many more mini pores‐More sensitive to aging (formation of oily heel)‐ Less sensitive to hot spot formation
VS50: ‐Mini pores are super‐activated‐ Expected life is more than 15 years in combination with DVS
Activated Carbon
-
All valves in the system are automatic and pneumatically operated. This will eliminate system failures due to malfunctioning of the electrically operated sequential valves and limit switches.
All the sequential valves are of double eccentric butterfly type with S.S disk and PTFE seal rings.
In case of lack of instrument air in site, a small standard ATLAS COPCO twin piston compressor with air buffer is supplied
All instruments within the package are ATEX certified
The unit resists the pressure of an eventual internal explosion
Safety Features
-
Precise monitoring of the explosion prone locations in the unit:
• Inlet vapor line (flame arrestor equipped with TAHH)• Carbon Adsorbers (TAHH)
Monitoring of discharge temperature of DVPs Monitoring of operational parameters of DVPs Monitoring of sequential valve positions Independent high and low level switches on the re‐absorber Double fail closing valves on each absorbent line Level switch on the condensate drain pot at the inlet to the
VRU …
Safety Features
-
As soon as the loading is finished and the activated carbon has been properly desorbed, the unit automatically switches to standby mode. All the pumps will be stopped and all the valves are closed.
Three levels of shut‐down: ESD push button acting on main switch
Normal shut‐down by main PLC
Independent second level shut‐downby the second PLC (watch dog)
Control and ESD
-
Control and ESD
-
PROJECT: EPC of Raysut Terminal Revamp
CLIENT: Sultanate of Oman, Ministry of Oil and Gas (MOG)
CLIENT REPRESENTATIVE: Oman Oil Refineries and Petroleum Industries Company (ORPIC)
PMC: Mott MacDonald & Company LLC (MMC)
CONTRACTOR: Rampco International Technical Services (RITS)
ENGINEERNG: Hampa Energy Engineering and Design Company (HEDCO)
LOCATION: Raysut, Salalah, Dhofar, Sultanate of Oman
Oman Raysut Revamp
-
Raysut Terminal is an onshore terminal operated by ORPIC. Theterminal has Gas Oil, MOGAS and II Jet A‐1 storage tanks and atanker loading area with loading pumps and gantries to supply theproducts to the Salalah and Dhofar region of South.Products are delivered to the terminal by means of ship from portof Salalah. Two pipelines deliver products from ship to theterminal and store them inside nine storage tanks.
Oman Raysut Revamp
-
Bay No.1 DieselBay No.2 GasolineBay No.3 II Jet A‐1 (no vapor arm)Bay No.4 GasolineBay No.5 Diesel
Oman Raysut Revamp
-
Emission value: 35 mg/m3 of vented vaporGasoline:max. VP 0.7 / 06 (winter / summer)Design Ambient (Absorbent) Temperature: 40 °C
4 bays in simultaneous operation: 4 x 137 = 548 m3/hT‐4 max. filling rate: 600 m3/h
Instantaneous Flow rate (Qi): 548 + 600 1148 m3/hCycle Throughput (Qc): 0.25 (4x137 + 600) 287 m3/h4 Hour Throughput (Q4h): 4 (4x137 + 600) 4592 m3/hDaily Throughput (Qd): 96 x 36.4 + 3880 7375 m3/h
Electricity: 415 VAC, 3PH, 50HzNo other utility available
VRU Design Inputs
-
VRU Design Outputs
Size of Vapor line to VRU: 10”Max. absorbent flow rate required: 70 m3/hSize of Absorbent lines: 4”VRU Skid Size: 8 x 10 x 10 (m)Weight of Skid: 80 tonsElectrical Consumption: (5x30 + 2x15 + 5) 185 kW
-
VRU Design Outputs
Size of El. Panels (incl. VFDs): 3 x (1000 x 2000 x 500 (mm)Size of Control Panel (incl. PLC): 1000 x 2000 x 500 (mm)Supervision PC: Conventional Desktop Size
-
Sub‐vendorsITEM DESCRIPTIONS VENDOR COUNTRY
Vacuum Pump BUSCH Switzerland
Absorbent Pump Hermetic GermanyAbsorbent Pump Hermetic GermanyBlower FIMA Germany
Blower MIDDLE EAST ENGINEERING LTD. CO. (MEELSA)
KSA
Blower HITACHI PLANT TECHNOLOGIES LTD TSUCHIURA WORKS
Japan
Detonation Arrestor ENARDO USAMotors ABB FinlandButterfly valves KSB S.A.S. AMRI DIVISION FranceAngle Globe Valve DRESSER PRODUITS INDUSTRIELS FranceThermal Expansion Valve LESER GMBH AND CO KG GermanyPressure Safety Valve LESER GMBH AND CO KG Germany
Level Indicator DANIEL MEASUREMENT AND CONTROL FLOW PRO
Level Switch MAGNETROL INTERNATIONAL NV Belgium
Level Transmitter DRESSER ITALIA SPA MASONEILAN PLANT
Italy
Temperature Indicator WIKA ALEXANDER WIEGAND GMBH AND CO
Germany
Temperature Transmitter WIKA ALEXANDER WIEGAND GMBH AND CO
Germany
RTD WIKA ALEXANDER WIEGAND GMBH AND CO
Germany
Pressure Switch WIKA ALEXANDER WIEGAND GMBH AND CO
Germany
Pressure Transmitter VEGA GRIESHABER KG Germany
Solenoid Valve THOMPSON VALVES PART OF NOGREN LIMITED
United Kingdom
IR online concentration measurment DETCON INCORPORATED USA
LV Motor ABB OY ELECTRICAL MACHINES LV MOTORS
Finland
PLC SIEMENS AG A AND D AS EWK Germany
Panels RITTAL GMBH AND CO Germany
-
26
Thank You for your attention
top related